AI Model Release Tracker - Timeline of Major AI Models from 2022-2026

Gemini 3.5 Flash vs Grok‑1

Google
Gemini 3.5 Flash
xAI
Grok‑1
Overview
CompanyGooglexAI
Release dateMay 19 2026Nov 3 2023
AccessProprietaryOpen Weight
Benchmarks
Nonsense detection
BullshitBench v2
20%
Agentic coding
SWE-Bench Pro
55.1%
Agentic coding
CursorBench v3.1
49.8%
Agentic terminal coding
Terminal-Bench 2.1
76.2%
Multi-step tool use
MCP Atlas
83.6%
General tool use
Toolathlon
56.5%
Multidisciplinary reasoning
Humanity's Last Exam · no tools
40.2%
Abstract reasoning
ARC-AGI-2
72.1%
Agentic computer use
OSWorld-Verified
78.4%
Agentic financial analysis
Finance Agent v2
57.9%
Knowledge work
GDPval-AA
1656
Chart reasoning
CharXiv Reasoning
84.2%
Multimodal reasoning
MMMU-Pro
83.6%
Spatial reasoning
Blueprint-Bench 2
33.6%
Long context
MRCR v2 (8-needle) · 128k average
77.3%
Long context
MRCR v2 (8-needle) · 1M pointwise
26.6%
Timeline
Release gapGrok‑1 shipped 928 days before Gemini 3.5 Flash

Which is better: Gemini 3.5 Flash or Grok‑1?

Gemini 3.5 Flash and Grok‑1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑1 shipped 928 days before Gemini 3.5 Flash, so benchmark comparisons should account for the intervening progress.

Gemini 3.5 Flash is proprietary, while Grok‑1 is open weight.

Direct benchmark comparisons are unavailable — Gemini 3.5 Flash and Grok‑1 don't publish scores on any of the same benchmarks.

Frequently asked questions

Gemini 3.5 Flash was released by Google on May 19 2026.

Grok‑1 was released by xAI on Nov 3 2023.

Gemini 3.5 Flash is a proprietary model released by Google. Grok‑1 is an open weight model released by xAI.

Other comparisons